Prom Dresses Under £100: Affordable Luxury

Get the look you love for less with our collection of prom dresses under £100. At HappyProm, we believe every student deserves to shine, regardless of their budget. Our affordable prom gowns feature the same high-quality craftsmanship as our premium lines, including free custom-made service to ensure your dress fits perfectly without the added cost of alterations.

▼ Smart Shopping: How to Find the Best Prom Dress for Under £100

High-Quality, Cheap Prom Dresses in the UK

Searching for cheap prom dresses in the UK doesn't mean you have to compromise on style or quality. Our **under £100 collection** is carefully curated to offer the latest 2026 trends—from shimmering sequins to elegant chiffon—at prices that won't break the bank. Whether you are looking for a short party dress or a floor-length evening gown, HappyProm provides luxury aesthetics at a fraction of the boutique price.

Save More with Free Custom Tailoring

The biggest hidden cost of buying a prom dress is often the alterations. At HappyProm, even our budget prom dresses come with our signature free custom-made service. By providing your exact measurements, you receive a gown that is ready to wear the moment it arrives. This "fit like a glove" promise saves you an average of £30–£60 on local tailoring, making our prom dresses under £100 the best value choice for UK students.

Reliable Service & Fast UK Shipping

HappyProm is a trusted prom store dedicated to making fashion accessible. We use premium fabrics that look and feel expensive, ensuring you feel confident on your big night. With fast delivery and a secure shopping experience, finding an affordable prom dress has never been easier. Explore our range today and discover why thousands of Year 11 and Year 13 students trust HappyProm for their milestone events.

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A perfect one shoulder chiffon dress, which has the emphasis on the shoulder, for the bridesmaid for..
£97.75 £89.00
Ex Tax: £89.00
This long V-neck chiffon DRESS must be the most classic one that you can wear at many occasions, suc..
£97.75 £89.00
Ex Tax: £89.00
Knee length short chiffon dress, lilac straps piece with gently gathered top hem and a wide belt tuc..
£84.72 £76.00
Ex Tax: £76.00
It is a beautiful floor length dress with a cheap price yet elegant style. This dress features a ple..
£97.75 £88.00
Ex Tax: £88.00
A flattering long partydress with several three-dimensional roses on the empire waist. Ruffled fabri..
£97.75 £88.00
Ex Tax: £88.00
An elegant long long chiffon dress with simple yet beautiful pleated strapless bodice features a wai..
£97.75 £88.00
Ex Tax: £88.00
A long simple floaty chiffon style that will work beautifully as a bridesmaid gown on for another fo..
£93.41 £84.00
Ex Tax: £84.00
Sexy one shoulder design, fashion and noble, with pure manual bright diamond, perfectly show the cha..
£108.61 £87.00
Ex Tax: £87.00
As noble angel, as beautiful princess, deep v-neck with manual sequins let luxury upgrade again, red..
£108.61 £99.00
Ex Tax: £99.00
The popular halter neckline is accented with beads and crystals on the front and back. A slim skirt ..
£108.61 £89.00
Ex Tax: £89.00
It's a sexy deep v-neck sequined halter and open back dress, which you can used on any occasion, suc..
£108.61 £86.00
Ex Tax: £86.00
This is a short dress with ruffled skirt, the v-neck make you look more cute.Silhouette:  A-Lin..
£84.72 £75.00
Ex Tax: £75.00
Yearn for grace melody? This butterfly type beaded shoulder dress will be a good choice, have it imm..
£108.61 £88.00
Ex Tax: £88.00
Preparing for a romantic mix-match wedding? The strapless style will be one of your girls' choice, i..
£89.06 £80.00
Ex Tax: £80.00
The design is based on the belief that girls should be as pure as goddess. This bridesmaid dress wil..
£86.89 £78.00
Ex Tax: £78.00
Luxurious chiffon ruffles create a sensational and unique one sleeve short prom dress or party dress..
£86.89 £78.00
Ex Tax: £78.00
The ivory white bridesmaid dress, simple and plain, yet classic. This bridesmaid dress is strapless...
£89.06 £81.00
Ex Tax: £81.00
A-line style is a traditional yet timeless design, this one featured with a v-neck, and the flowered..
£89.06
Ex Tax: £89.06
Looking for a beautiful short one shoulder dress? Look no further than this elegant short one. It is..
£86.89 £78.00
Ex Tax: £78.00
Looking forward to have a perfect mix-match wedding? This one shoulder style will be one choice for ..
£89.06 £84.00
Ex Tax: £84.00
Looking forward to have a mix-match wedding? This one will be one of your bridesmaid dresses, it is ..
£89.06 £81.00
Ex Tax: £81.00
Fabulous meets flattering in this strapless short dress. Treat it as bridesmaid dresses, also prom d..
£86.89 £78.00
Ex Tax: £78.00
Can't decide whether you want a short or a long gown? This halter dress has a mid thigh length in th..
£86.89 £77.00
Ex Tax: £77.00
This short strapless dress is made of chiffon and you can custom sizing and colors. The perfect shor..
£86.89 £78.00
Ex Tax: £78.00
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Deals Of The Day
Sexy Sparkly Plunging V-Neck Dark Grey Prom Dress with Slit KSP491
Embrace Modern Sophistication in Our Dark Grey Sparkly GownRedefine evening glamour with the KSP491...
Special price:£95.00
Old price:£120.00
You save:£25.00
Beautiful Sunset Long Ombre Cape Prom Dresses KSP421
The beautiful long prom dresses in color same as sunset in maxi dress style, with this ombre prom dr..
Special price:£118.15
Old price:£128.50
You save:£10.35
Black Crystal Embellished Halter A-Line Prom Dress KSP541
Step Into Elegance with Our Crystal Halter A-Line GownDiscover the perfect blend of modern sparkle a..
Special price:£119.00
Old price:£140.00
You save:£21.00
Floral Embellished Sheer Corset Prom Gown - Sweetheart A-line Champagne Gold Tulle Gown KSP655
Make a dazzling entrance at your next big event with our KSP655 floral embellished prom gown. This s..
Special price:£138.00
Old price:£150.00
You save:£12.00
Lilac Purple Applique Corset Mermaid Prom Dress KSP632
Define Your Curves in Our Lilac Applique Mermaid GownMake an unforgettable entrance with the KSP632...
Special price:£127.00
Old price:£138.00
You save:£11.00
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